Anita Elberse of Harvard Business School predicts that more clubs will do deals with hotels to penetrate emerging markets. A rooftop club can make more money for a hotel than its rooms. Morgans Hotel Group, a luxury chain, last year bought the Light Group, a big American nightclub operator, for this reason. Andy Masi, the Light Group's boss, says that working with a hotel helps him meet the right people as he expands abroad.